<template>
  <div>
    <!--头部滚动条-->
    <div id="slider" class="mui-slider">
      <div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted"
      >
        <div class="mui-scroll">
          <!--绑定样式类-->
          <a
            :class="['mui-control-item',item.id==0?'mui-active':'']"
            v-for="item in cates"
            @tap="getPhotoListByCateId(item.id)"
            :key="item.id"
          >{{item.title}}</a>
        </div>
      </div>
    </div>
    <!--中间图片展示部分-->
    <ul class="photo-list">
      <!--注意id需要匹配-->
      <router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo/'+item.id" tag="li">
        <img v-lazy="item.img_url" />
        <div class="info">
          <h1 class="info-title">{{item.title}}</h1>
          <div class="info-body">{{item.zhaiyao}}</div>
        </div>
      </router-link>
    </ul>
  </div>
</template>

<script>
import { Toast } from "mint-ui";
import mui from "../lib/mui/js/mui.min.js";

export default {
  data() {
    return {
      cates: [], //所有分类的列表数组
      list: []
    };
  },
  created() {
    this.getAllCategory();
    //默认进来时自动请求所有图片
    this.getPhotoListByCateId(0);
  },
  mounted() {
    //解决刚进入页面不能滑动的
    mui(".mui-scroll-wrapper").scroll({
  deceleration: 0.0006 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
});
  },

  methods: {
    getAllCategory() {
      this.$http.get("api/getimgcategory").then(result => {
        if (result.body.status == 0) {
          result.body.message.unshift({
            title: "全部",
            id: 0
          });
          this.cates = result.body.message;
        }
      });
    },
    getPhotoListByCateId(cateid) {
      //根据分类ID,获取图片列表
      this.$http.get("api/getimages/" + cateid).then(result => {
        if (result.body.status === 0) {
          this.list = result.body.message;
        } else {
          Toast("获取图片列表失败");
        }
      });
    }
  }
};
</script>

<style scoped>
* {
  touch-action: pan-y;
}

.photo-list li img {
  width: 100%;
  vertical-align: middle;
}

.photo-list li img[lazy="loading"] {
  width: 40px;
  height: 300px;
  margin: auto;
}
.photo-list li .info .info-title {
  font-size: 14px;
}
.photo-list li .info .info-body {
  font-size: 12px;
}

.photo-list li .info {
  color: white;
  text-align: left;
  /*子绝*/
  position: absolute;
  line-height: 14px;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.4);
  max-height: 80px;
  overflow: hidden;
}

.photo-list li {
  background-color: #ccc;
  text-align: center;
  margin-bottom: 10px;
  box-shadow: 0 0 9px #999;
  /*父相*/
  position: relative;
}

.photo-list {
  list-style: none;
  margin: 0;
  padding: 10px;
  padding-bottom: 0;
}
.mui-scroll{
  position: fixed;
  background-color: aliceblue;
}
</style>